When running Bonnie, you should always set the file size to 3-4
times the size of your RAM, else you get the 200Mb /sec speeds
(which are very pleasant, but not realistic). I think the 100% CPU is
in great part Bonnie generating the test files. I've tried copying files,
this takes almost no CPU power.
The crashes are very annoying, no messages in the logs or
anything. I've run extensive memory tests and today I'm installing a
new 3c905 card i case that's the problem. After that I don't know...
Rearranging all PCI cards?
I'll tell if I discover anything useful.
Kent
> Funny (or not), this sounds a lot like my current problems.
>
> I have a HP Netserver LH4 with integrated HP Netraid controller. When
> doing heavy I/O on the Netraid controller the entire system more or
> less freezes. I am using newet firmware version (have even tried a
> few older versions), and have tried it on 2.2.14 and 2.2.15pre14.
>
> Doing bonnie on a single 9GB HP disk shows the following:
>
> -------Sequential Output-------- ---Sequential Input--
> --Random-- -Per Char- --Block--- -Rewrite-- -Per Char-
> --Block--- --Seeks---
> Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU
> /sec %CPU
> 100 7771 99.5 6753 3.8 4513 9.2 7830 99.6 245756 100.8
> 22572.5 95.9
>
>
> That is approx. 4 times faster on block read than block write, but
> 100% cpu load on block read!!
>
> I was coming to the conclusion that I had to look deep into the AMI
> Megaraid driver to try and locate the problem, but could the problem
> by chance be more generic ?
>
> Can anyone offer some qualified guidance about where to start look for
> this problem ?
>
> /bart
